Including the start and end dates in the calculation, there are 565 days between the two dates.
564 Days
There are 58 days from December 28, 2010, to February 24, 2011.
There are 25 days between December 13 2010 to January 7 2011.
365 days.
There are 177 days between December 28 2010 and June 22 2011.
It would be 68 days between December 12 2010 and February 18 2011.
609 days.
Between December 4, 2010 and March 11, 2011 there are 97 days.
56 weeks and 3 days
365 days
238 days after December 1 2010 is Wednesday, July 27, 2011.
90 days after Tuesday, December 28, 2010 = Monday, March 28, 2011.
Adding 180 days to December 30, 2010, gives June 28, 2011.